Physics
Physics A01 3 with Crawford at Utah Valley University
About this deck
By: Kyle DeLong
Created: 2011-05-12
Size: 34 flashcards
Views: 136
Created: 2011-05-12
Size: 34 flashcards
Views: 136
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Constant acceleration equations
_
v= v0 - v
2
Δx=v0 t + 1/2at2 : Displacement as a function of time
v=v0 +at : Velocity as a function of time
Average Acceleration
_
a=Δv = vf - vi
Δt tf - ti
Average Velocity
_
v=Δx = xf - xi
Δt tf - ti
Adding Vectors Algebraically
Ax = A cos (ø) = X(A cos (ø)) Bx = B cos (ø) = X(B cos (ø))
Ay = A sin (ø) = Y(A sin (ø)) By = B sin (ø) = Y(B sin (ø))
Rx = Ax + Bx Ry = Ay + By
Magnitude and Direction of R
Magnitude of R=sqrt of Rx2 + Ry2
Direction of R: ø=tan-1 (Ry )
(Rx )
Displacement, average Velocity, average Acceleration of an object
ΔR≡Rf - Ri Vavg ≡ ΔR Aavg ≡ ΔV
Δt Δt
Work
W=FΔx
SI unit: joule=newton x meter=kg m2 /s2 and is a scalar quantity
W≡(F cos θ) Δx
Work done by friction
Wfric = -μk mgΔx Wfric = -μk (mg - Fapplied sinθ)Δx
Wnet = Wapplied + Wfriction + Wn + Wg : N and G are not applied when perpindicular.
Kinetic Energy
KE=1/2mv2 measured in joules and IS A SCALAR
Wnet =KEf - KEi = ΔKE
Average angular speed
ωavg = Δθ units: radians/second rev/s • 2π rads
Δt rev
Angular acceleration
aavg = Δω SI unit: radians/second2 positive in counterclockwise direction.
Δt
Rotational Motion
ω=ωi + at
Δθ=ωi t + 1/2 at2
ω2 = ωi2 +2aΔθ
Tangential speed and acceleration
vt = rω
at = ra
Centripetal Acceleration and total acceleration
ac = v2 = rω2 a= sqrt:at2 + ac2
r
Newtons Law of universal gravitation
F=G m1 m2 G=6.673 x 10-11 N•m2 /kg2
r2
Kepler's Law, eliptical orbits of planets
T2 = (4π2 / GMs )r3 where Ms is mass of sun or other central located body.
Torque
T=Iα SI unit = N•m
T = rF(sin θ)
Moment of Inertia
I = mr2 / 2
Conservation of Angular Momentum
Ii ωi = If ωf
Density
ρ = m / v SI unit: kg/m3 v = π r2 h
Pressure
P = F / A SI unit: Pascal; Pa; newtons per square meter
Area of rectangle= length x width
P=Po (atmospheric pressure) + pgh
Bernoullis equation
P + 1/2ρv2 + ρgy
Stress and Strain modulus
Stress is related to the force per unit area producing a deformation; strain (dimensionless) is the measure of of the amount of deformation. (elastic modulus) Stress=elastic modulus • strain.
Youngs modulus: resistance of solid to elongation or compression, Y.
Shear modulus: resistance to displacement of faces of solids sliding past eachother, S.
Bulk modulus: the resistance of solid or liquid to change in volume, B.
Archimede's principle, bouyancy
B=ρfluidVfluidg
Temperature
Tc = 5/9(Tf - 32)
Tk = Tc + 273.15
Thermal Expansion
ΔL= α L0 ΔT where α equals the coefficient of linear expansion.
Coefficient of volume expansion
ΔV=βV0 ΔT where β equals (3α)
Coefficient of area expansion
ΔA=γA0 ΔT where γ equals (2α)
The Unusual Behavior of Water
temperature increases from 0°C to 4°C, water contracts, so its density increases. Above 4°C, water exhibits the expected expansion with increasing temperature. The density of water reaches its maximum value of 1 000 kg/m3 at 4°C.
Avogadro’s number
NA= 6. 02x 10 ^23 particles/ mole
ideal gas law
PV= nRT R= 8.3 1 J/ mol • K R = 0.082 1 L • atm / mol • K
About this deck
By: Kyle DeLong
Created: 2011-05-12
Size: 34 flashcards
Views: 136
Created: 2011-05-12
Size: 34 flashcards
Views: 136
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
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